Physaria johnstonii (Rollins) O'Kane & Al-Shehbaz Physaria johnstonii (Rollins) O'Kane & Al-Shehbaz in Novon 12(3): 324. 2002 sec. Al Shehbaz & O'Kane Jr. 2002≡Lesquerella johnstonii Rollins in Contr. Dudley Herb. 3: 179. 1941 syn. sec. Al Shehbaz & O'Kane Jr. 2002